physical education. n. (Education) training and practice in sports, gymnastics, etc, as in schools and colleges. Abbreviation: PE. physâ²ical educaâ²tion. n. instruction in sports, exercise, and hygiene, esp. as part of a school or college program.
3. Stress/injury. Stress on the tissues or any type of injury in the mouth can cause canker sores. Since the sores are actually tiny ulcers, they can be caused by any kind of hard brushing or eating something that can cause bruises or lead to tissue inflammation in the mouth.
There are many suspected causes, including vitamin B-12 deficiency anemia â a lack of healthy red blood cells caused by a lack of vitamin B-12. When this kind of anemia is the cause of burning mouth pain, it can also cause the tiny projections (papillae) on your tongue's surface to disappear (left). If left untreated, your tongue may even lose muscle mass (right).